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SPEED INDICATOR. 4 No. 404,992. Patented June 1l, 1889.

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No. 404,992.I Patented June 11, 1889.

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0. SPRATT. SPEED INDIGATOR.

No. 404,992. Patented June 11, 1889.

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No.1404,992. Patented June 11, 1889.

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C lSPRATT SPEED INDICATOR.

Patented June 1l, 1889.

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No. 404.992. Patent'edJune 11, 1889.

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SPEED INDICATOR.

No. 404,992. Patenteune 1L 1889.

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No. 404,992. 4Patented June 11, 1889;l

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C. SPRATT. SPEED INDIGATOR.

No. 404,992. Patented June 11, 1889.

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France February 13, 1889, No.

To @ZZ when?, z may emmer/L.-

Be it known inet i, CHARLES SPRATT, eleel-rieinn, a subject of the Queen of Greab ifriinin, residing nit il Erlanger Rond, New {frons in 'the county of lient, England, have invented certain new and useful linproveinenis in Speeddndieaors, (for which l have received 'Letiexs laient in` Gren( ,l'ritniinh'o. 1,71l,oi`ehrnnry 4,1888; in France, No. luf/,0531), of l `e`i)runrj,f lfl, 1839, and in lelgioni, No. 85,016, ol' February l5, 1885),) of whieh the following is :i npeoiienlion.

This in .'enlion hun for its ohjeoiiimprove menig in Speed-iudifnlors. The npgnrnllus in red that ii enn he merle le einen' nl:

`zany-linie when required ihespeeil ol remiien of n. niennrenggine or eher innel neeiion will! which ille iuilienim' plied. The indisczil'er which l enli ille Lrinslniiler, is in the irnniedinle vieinii'y oi' ihe engine or nuieliine. The eiher, which onli ihe reoei.'er," is in any ill/(Lee `where may he eonvenieniJ that ihn indieniion should he given.l The two parte nr@ connected lhy eiecirie Circuits. ilihen desired, iwe or there receivers een he uned in connection wilhmie ifrninnnit-ier. in ihe inznnnniiiier there is n elo-nlf-ifnin. It i5 riffnined hy n. pn '1, nnd iL eon'hnenees 1,0 run when he remining-perni in lifiefl. 'lhis is :Tone hy in eleeironingiien, the eireuii'. uhrough rrhh: is eieseii hy ineens ef :i pressi-button in ih( reeeirer whenever ihe inee'hnnism is required lo operate. The eloelbworli rune for n Sheri. linie, long enough for the Conni. lo im ninde, and is llien stopped by the pnn'l. 'The eine -wnl in eonlrolled hynlizn erother linie?, :ind iinspeed is :ieenrniiely adjusted hy duly prerieriilening the dilnennionn of the fen. .in ehe eh weils ihere sin :ixis with upon i. ,Wlien ihe axis ro- .'piernie to elose eine iii eleeirie eirenil. :n @ling the me p; in of the nppzirnus. l.` 'e ereuiin A will ille unwilling line in eeninny he nisis in info paris. Une,

luiVl A ie operaie ilnfermningnl the omer eireuit l enll the le uit. Ein duly iosei ilneeuni- Lozere. 'iiie gap in the rephieniiy is closed hy ihe operation of iiheenzn :leen niier SPHATT, 0F NEW' CROSS GATE, COUNTY 0F KENT, ENGLAN.

forming part of Letters Patent No. @04,99% dated June l, R859.

lllo model() Patented 196,060, and in in England February 4., 1888, lilo. 1,711; in

Belgium February l5, 1889, No, 85,616.

A l l the eleeleworl; in sinriefl, und ille i sterling-keg.'

nerlorn'im'h ne hereinafter described. It is not until this operation is completed and the replacing-circuit isngziin open that the other cani eloses the gap in the counting-circuit and keeps it closed (hiring a deinite accuratelyineasured interval-for exemple, n qnarterof e minnie. In the counting-enfuit, however, there in :i Second gap, which is closed nt intervals by nnoil1eienni,nnd this eznn is on nn axis driven by the engine or machine 'the speed of which hns o he ascertained. This anni may he no ninde that il closes and opens he gzip fou r times in eneh revolution;

The opera-tion of the Li-ansinii-ier is thus as follmrs: The ohnerrer el.' che receiver starts ille eleeiewerl; hy pushing' in the presfsd'iut ton proviihifl for the purpose. As Soon ne the Cloak-wolk commences to run i sends n eurreni el' snliieien: duration through the replacing-eireut.. Then for a. given interval (say n quin-rer of a minnie) the apparatus sends .il succession of currents (sally four for every rewnution of the engine) through the 'counting- J-ireuit." "he counting-Circuiti is nfierwnrd held open continuously and the eleelework is brimght to rest. Two :Hiernative courses provided for the completion olf the eounuing-eireuii'. it Wiessee in one Course when the engine is goingnhead and in 8o the other course wh xn the. engine iS going siem Thin in eleeted h )r providing in the trnnsniiilm n rocking' eontnei;hlnf.i`e. 'It in fixed npon n hesS,lli1rin|;;h whieh the zi-xiS driven h5' Lhe egine passes. The friction heiween the hess :ind the revolvingzixis holds ihe binde :against n (mntiulfsiud nml eenipletes ine eireuii. when Mie engine is reversed, the hens with the hlzide turns with the eine through sninli :ingle snflieiinit io minne he binde io' inns i'reni one eonneifsl-iul io nnolner.

YProvision in nniile im' il in nei' he eleel-z-werk hy himmel iheengine.

The reeexol eonininS the following pzirlx: 95 ihe Smiling-key,lheeennling"meelmnisnnbhe mechanism for relslneinyg Lilo eonniingr-wheels ie'/;eio,:n1 i the indienlori'oreshnwinnwhether -he engine is running' ahead or (intern. The

in n simple nieehnnisin closing loo ie nuiomnlie vrindtho call-circuit when a press-button is pushed in., The countingr mechanism comprises an electro-magnet in the counting-circoit, an armature, and a propelment-arm operated th ereby and driving a ratchet or propelment wheel, with which a ooui'lting-train is geared.

The replacing mechanism comprises an electromagnet and armature operating,r a sliding bar which controls the positions of the counting-wheels, taking them out of gear with each other and with the driver and returning them into gear as required. The replacing meehanism also comprises another electro-magri et a'nd armature, giving movement to another sliding bar or set of bars, which operate with cams upon the axes of the counting-wheels. r These cams are of heart-like form, but iattened at the base. Each axis has such a cam upon it, and there is a corresponding bar working with the cam. `When the edge or' the bar lies against the flat of the cam, the axis is locked at. the zero position of the counting-wheel; but by the endwise movement of the bar a recess in it is brought opposite to the cam and the axis is then free to turn. 'lhe movement of the bar in the opposite direction brings the end ofthe recess against the cam', and by its pressure it turns the cani until the zeroA posilin is reached. When the replacing@r current from the trans niitter reaches the receiver, it iirst causes the counting-wheels to be thrown out of gear hy exciting one of the electro-magnets above mentioned, and `then the armature of this magnet makes a contact which enables the replacing-current also to' flow in the coils of comming-current passes through one or other' oi these, according to the course' by which this current reachesthe receiver, and then this magnet Aattracts the armature. The ar mature carries a toothed are `gearing,r with av pinion, and the axis of 'the pinion carries a light dial on which the Words Ahead and Astern are w ritten. One or other of' those signs is brought opposite to an aperture in the iixr-d dial ot the instrument, according'to the position given to the movable dial.

In order that myinvention maybe fully understood yand readily carried into eii'ecl, l will proceed io describe the drawings hereunto annexed.

1n the drawings, Figure is an elevaiion, with paris removed, of the portion of the transmitter Coninining the axis driven by tinx engine or machine, also the paris for openingF am ,closing the counting-circuit :i suitable number of times during each rotation of the said axis, arid the apparatus for directing the counting-current into one or other of two pat-hs, according,r to the direction of rotation of the axis. Fig. 2 is a'plan of the same parts.

Fig. i is a plan ot' the portion of the trans- 'other part-s of the winding mechanism. Fig.

i) is a front elevation of the receiver with its ease removed. the same with the case in section. Fig. 11 is a section oni'he line 11 11 in Fig. 10. Fig. 12 is a side view of the axis of one of the counting-wheels with the parts mounted th'ereon.

4,at their inner ends. Fig. 15 yis a horizontal section of these hars.' Fig.16 shows the bars .in another position as they are when holding Fig. 17 is an elevationl the wheels in gear. showing the face 'of the receiver, and some other parts are also-indicated. Fig. 18 is a section showing the press button and parts in immediate connection therewith,` and also the magnet by which lthe counting-wheelsare taken ont of gear. Fig. 10 is a diagram illus-v trating the general arrangement of the parts and'clrouts. 'In Figs. 1 and 2, c is an axis on which is a small 'vbeltfpuliyf It receives a driving-strap passing also around a correspondingpulley4 'on the shaitor axisof the engine or machine.

inthe ease of a steanrenginc it is convenient to pass the strap around the. main shaft.

o is a cam on the axis o. It operates against a small roller o at the extremity of a spring-arm Z). The arm i) is fixed upon a block of vulcanite or other insulating material, and so is also another arm c. The arms l) and o carry contacts, which are .brought together when the cam acts upon the arm l), and which separate when the roller b drops into the hollows of the cam. Adjustirrgscrews are provided, as the drawin indicato. The springs i; and c are in the counting-circuit, and. when they are separated ihe circuit is open.

d is a boss, oi insulatingmaterial, loose on the axis o. lt is pressed by the spring,r d against the side of the eamo. The boss carricsza blade d, and lthis makes contact with one or other oi' the studs il il, according to the direuiionin which the axis cr is running.

Fig. 10 is,a side elevation of.V

chine, which can bethus counted up to the number of nine hundred and ninety-nine in the minute.

The axes r, r', and r2, at their outer ends, are carried by the links s .5' s, and at their inner ends th ey turn in bushes K f 1, on the links, which bushes are held between two bars 11. and n. lhe bar u is fixed and might be part of the instrument; but the barn is able to slide to and fro a short distance under the iniiuencc of the spring 'u' and the electromagnct irl mounted on an axis which is provided with an arm w, and this arm is jointed to the bar Au. The bars u and -v are both provided with elongated holes, into which the bushes t tt are received, and when the bar c is moved by the magnet it carries the bushes with it; but from the arrangement of the slots they are moved diterent distances. The axes 7', r', and r2 are moved with the bushes, and so, when the magnet w operates, all the axes are taken out of gear, and when it ceases to operate they are returned into gear by the spring. Vv'hen the arm w. has taken the' wheels out of gear, it completes a contact at x, and then the electric current. is divided 'between the magnet w and the magnet y. The magnet y has an armature z, carried by arms on the axis z', von which is also a lever, An arc of teeth z2* on the level' z2 gears with a pinion A, and on the same 1il the axis reaches the zero position.

axis with this pinion there is a toothed wheel A', gearing with rack-teeth B on the bar B. In the bar B there is a recess B2, and whenthe axis r of the first counting-wheel leaves its zero position the camC on this axis enters the recess B2, which, however, is of such dimensions that the rotation of the axis is not interfered with; but when, the count having been made, the bar B is moved by the magnet the shoulder l 2X at the end of the re* cess comes against the cam C, and, the axis being now out of gear, the cam is turnedun- The upper edge of the bar passes the flat of the cam, and the axis is so held as long as the bar retains its position. When the electric current ceases, the two electro-magnets release their armatures, and the axes fall into gear again and are set free. There are other bars B and l5X attached to the bar B, and these operate in a similar manner with heart-cams C on the axes r and r2.

D D2 are two electric magnets, through one or other of which the counting-current reaches the receiver, and .ll is the armature which they control. It is upon a lever which also carries the arc of tt 3th E', gearing with a The armature of this magnet is pinion li", which is upon the same axis with the movable dial F, on which the words Ahead77 and Astern are printed, and, as seen in Figi?, one orl other of these words becomes visible through an aperture in the stationary dial of the receiver.

G isthe press-button which closes the start ing-circuit. v

Fig. 19 is lettered Ain accordance with the preceding description as far as the diagrammatic nature of this figure admits.

What I claim isy l. A speed-indicator, substantially as de-. scribed, consisting lin a transmitter and re ceiver connected by electric circuits, und com prising clock-work which for a certain time Vallows a counting-circuit to be completed, a contactfmaker actuated by the engine or machine and operating to close and open the connting-circuit during the interval allowed by the clock and lmore or less' frequently in 8o accordance with the speed of theengine or machine, an 'electro-magnet or electrical mechanism operated by thev closing and opening of the counting-circuit, counting-wheels driven by such magnet or mechanism, and

apparatus replacing the counting-wheels to the zero position after use and ready toagain operate.

2. A spced-indicator, substantially as described, consisting in a transmitter andV re- 9o ceiver connected by electric circuits, and eom- 1 prising mechanism which for a cc'rtain'tiine i all'ows a counting-circuit to be completed, a contact-maker actuated by the engin'eo machine and operating to close and open the counting-circuit, an electro-magnet or equi vnf lent mechanism operated by the closingand opening of the counting-circuit, countingwheels operated by such mechanism, and a circuit-closer in the receiver.v in circuit with loo an electro-magnet or equivalent mechanism in the transmitterv operating to start the mechanism when its indication is required.

. 3. The mechanism, substantially as described, for replacing the {counting-wheels,

consisting of parts which move the wheels int-'o and out of gear with each other and `with the driver, and cams on the axes of the whccls,' and bars operating. in conjunction with such earns to turn the Wheels to the zero positions im and to release them when they have again' passed into the zero position. 

